Data and metadata are organized: alphabetically by ID, by platform, by year, by region, by particpant, by organization, and by project/theme.

Data are organized based on a Field Activity. Each Field Activity has a four-component ID that represents the platform, leg, year, and region. Other IDs may also be associated with the Field Activity.
An Activity ID can be used to directly reference a Field Activity. Frequently, only a partial ID is known. To find Activites based on partial knowledge of the ID, IDs are also organized:

by platform name, such as ship, aircraft, beach;

by year of the activity;

by general geographic region of the activity; and

by participants in the activity.

Activities and data where the platform, year, or region are unknown are accessible as incomplete IDs.